Diazoaldehyde Chemistry. Part 3. Synthesis of 4-acyl-1<i>H</i>-1,2,3-triazole derivatives
作者:Özkan Sezer、Kadir Dabak、Ahmet Akar、Olcay Anaç
DOI:10.1002/hlca.19960790212
日期:1996.3.20
Ten new α-diazo-β-oxoaldehydes were condensed with aniline, ammonia, hydroxylamine, and semicarbazide to yield new 4-acyl-(1-substituted)-1H-1,2,3-triazoles in moderate-to-good yields. The method is simple and regiospecific. The latter feature makes this method superior to the widely used acylacetylene + azide approach.
将十种新的α-重氮-β-乙醛与苯胺,氨,羟胺和氨基脲缩合,以中等至良好的产率生成新的4-酰基-(1-取代)-1 H -1,2,3-三唑。该方法简单且区域特异性。后一种功能使该方法优于广泛使用的酰基乙炔+叠氮化物方法。
Diazoaldehyde Chemistry. Part 1. Transdiazotization of Acylacetaldehydes in Neutral-to-Acidic Medium. A Direct Approach to the Synthesis of α-Diazo-β-oxoaldehydes
作者:Özkan Sezer、Olcay Anaç
DOI:10.1002/hlca.19940770819
日期:1994.12.14
non-deformylating transdiazotization of acylacetaldehydes was achieved: the reactions of 2-azido-l-ethylpyridinium tetrafluoroborate (4) with acylacetaldehydes 3 proceeded partially without deformylation to yield 16 new α-diazo-β-oxoaldehydes 1 along with diazomethyl ketones 2, especially in the presence of NaOAc (Scheme 1, Tables 1 and 2). The product distribution was substituent-dependent and could
Preparation and spectra of mercuribis (α-diazo ketones)
作者:P. Yates、F.X. Garneau、J.P. Lokensgard
DOI:10.1016/0040-4020(75)80183-9
日期:1975.1
Bis (α - diazophenacyl) mercury (2a), bis (α - diazo - 2,4,6 - trimethylphenacyl) mercury (2b), bis (1 - diazo - 3,3 - dimethyl - 2 - oxobutyl)mercury (2c), and bis (1 - diazo - 2 - phenylacetonyl) mercury (2d) have been prepared by treatment of the corresponding α-diazo ketones with mercuric oxide. The solution IR, UV, and 1H NMR spectra of 2a–d and of three other mercuribis (α-diazo ketones) have
双(α-重氮苯甲酰基)汞(2a),双(α-重氮-2,4,6-三甲基苯甲酰基)汞(2b),双(1-重氮-3,3-二甲基-2-氧代丁基)汞(2c) ,并通过用氧化汞处理相应的α-重氮酮制备了双(1-重氮-2-苯基丙酮基)汞(2d)。已将溶液2a–d和其他三种水银(α-重氮酮)的IR,UV和1 H NMR光谱与相应的α-重氮酮的光谱进行了比较,两者之间的相似性得出了结论这些汞衍生物在溶液中的存在是通过与碳键合的汞实现的。2a的13 C NMR共振谱和的α重氮- α - methylmercuriacetophenone(9)已经被检查的证据199 HgC耦合; 对于Me碳,在9的情况下观察到,但对于重氮碳,在任何一种情况下均未检测到。这归因于检测和/或配体交换的困难。在这些光谱中,重氮碳的信号出现在异常高的电场下。在几种α-重氮酮的光谱中也进行了类似的观察,其化学位移在δ50-70范围内。
Vinyl Alcohols. IX.<sup>1</sup> Esters of 1,2-Dimesitylvinyl Alcohols